A) 3.5 km/h
B) 5.75 km/h
C) 6.5 km/h
D) 7 km/h
Correct Answer: A
Solution :
[a] Speed downstream \[=15.5\,km/h,\] Speed upstream\[=8.5\text{ }km/h\] Speed of the stream\[=\frac{1}{2}(15.5-8.5)\] \[=3.5\,km/h\] |
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